Im not sure about trade ins.I bought mine new...If you buy the separate 120gb hdd..it comes with the migration cable.You can also contact ms with your elite serial and your original premium/core serial and they will send you a cable.
Might as well add me, after ordering one on release day still no sign of it. Several calls to 'customer support' and now they they have no record of my request, they're out of stock and I presume I'm at the back of the queue again.
i've pm'd rjay, ive used a memory card to transfer my saves and gamer profile and just redownloaded my content, the bloke in gamestation sold it me for 15quid then said he'll refund me tomorrow, bonus and saves waiting for MS to get their arse in gear, many thanks anyways but can i now be removed from the list please